Question

1. which property is constant in the combined gas law?

number of particles
temperature
volume
pressure

Explanation:

Combined gas law is \( \frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\), it combines Boyle's law (\(PV = \text{constant}\) when \(n,T\) fixed), Charles's law (\(\frac{V}{T}=\text{constant}\) when \(n,P\) fixed) and Gay - Lussac's law (\(\frac{P}{T}=\text{constant}\) when \(n,V\) fixed). In the combined gas law, the number of particles (\(n\)) is constant.

Answer:

number of particles